QS80 Smartwatch: • 1 TFT screen.39-inch full touchscreen with automatic wake-up by turning your wrist. Smart multifunction crown. Split screen information and quick access. •Incoming call notification, you can answer, reject and talk from the watch itself. With Bluetooth dialer. •Push notifications from apps such as WhatsApp, Facebook, Instagram, SMS, etc. •Stopwatch, countdown, smartphone search, alarm, games, remote shutter for your smartphone camera, remote control of music playback on your phone, and the ability to play music audio from your watch. •Multiple dials of various styles and interchangeable. ( App Required). Allows you to install backgrounds with your own photos. •Compatible with universal straps with 22mm Quick Release system. •Supported languages: English, German, Russian, Spanish, Portuguese, French, Japanese, Italian, Polish, Chinese. •Includes magnetic USB charging cable. Health Features: • Heart rate monitor, blood oxygen level, blood pressure, body temperature. •Pedometer with step, distance and calorie measurement. •Various sports modes, such as: walking, running, hiking, cycling, skipping, basketball, badminton, football, yoga (such as Push). •Respiratory rate and breathing exercises. •Female physiological cycle: physiological period, ovulation period, safe period. •Sedentary lifestyle warning. •Sleep monitor. System Requirements: Android 4.4 / iOS 9.0 or higher Bluetooth version: 5.2 Screen: 1.39 inches, touchscreen, TFT Resolution: 360x360px Battery: 260mAh Battery life: approximately 5 to 7 days Charging time: 2 hours Flash memory: 128MB Waterproof rating: IP67, do not expose to condensation, hot showers, etc. Working temperature: -20°C to 60°C Charging temperature: 0°C to 40°C Working humidity: 10%-90%RH (non-condensing) Storage temperature: -30°C to 80°C Relative humidity: 5%-90%RH (non-condensing) Strap size (long position): 22 mm x 122.5 mm Strap size (short position): 22 mm x 76 mm Metal alloy, ABS, PC, silicone For the smartwatch to work, you need to download a free app for synchronization. To do this: • Scan the QR code included in the instruction manual and download the app. •You can also download the “Fit Cloud Pro” app directly from the Google Play Store (Android) or App Store (iOS). •Once downloaded and installed, open it and accept all requested permissions; sync the smartwatch with your mobile phone via Bluetooth using the app.